Fix kconfig symbol address

aya-obj/src/btf/btf.rs

@@ -889,8 +889,8 @@ impl Object {
                         section_data.resize((symbol.address - offset) as usize, 0);
 
                         self.symbol_offset_by_name.insert(name, symbol.address);
+                        offset = symbol.address + section_data.len() as u64;
                         section_data.extend(data);
-                        offset = symbol.address + data.len() as u64;
                     } else {
                         return Err(BtfError::ExternalSymbolNotFound { symbol_name: name });
                     }

test/integration-test/bpf/kconfig.bpf.c

@@ -3,11 +3,24 @@
 #include <bpf/bpf_helpers.h>
 // clang-format on
 
+// CONFIG_BPF=y => 1
 extern unsigned int CONFIG_BPF __kconfig;
+// CONFIG_PANIC_TIMEOUT=0 => 0
+extern unsigned int CONFIG_PANIC_TIMEOUT __kconfig;
+// CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
+extern unsigned int CONFIG_DEFAULT_HUNG_TASK_TIMEOUT __kconfig;
 
 SEC("xdp")
 int kconfig(struct xdp_md *ctx) {
-  if (!CONFIG_BPF) {
+  if (CONFIG_BPF != 1) {
+    return XDP_DROP;
+  }
+
+  if (CONFIG_PANIC_TIMEOUT != 0) {
+    return XDP_DROP;
+  }
+
+  if (CONFIG_DEFAULT_HUNG_TASK_TIMEOUT != 120) {
     return XDP_DROP;
   }